The AC Voltage Detector provides fast and reliable non-contact detection of live AC voltage. It supports high sensitivity (12V–1000V) and low sensitivity (48V–1000V), making it suitable for electrical maintenance, outlets, cables, switches, and troubleshooting. The device includes sound and light alarms, a white LED flashlight, auto power-off, and low battery indication. Powered by 2×R03 AAA batteries, it is compact, safe, and easy to use.